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<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
<title>gr-opacity-diff-mode</title>

<link rel="import" href="../node_modules/polymer/polymer.html">
<link rel="import" href="../node_modules/@polymer/test-fixture/test-fixture.html">
<link rel="import" href="../node_modules/iron-test-helpers/iron-test-helpers.html">
<link rel="import" href="./gr-opacity-diff-mode.html">

<script>void(0);</script>

<script src="../node_modules/webcomponents.js/webcomponents-lite.min.js"></script>
<script src="../node_modules/web-component-tester/browser.js"></script>
<script src="../node_modules/@polymer/sinonjs/sinon.js"></script>

<test-fixture id='opacity-diff-fixture'>
  <template>
    <gr-opacity-diff-mode></gr-opacity-diff-mode>
  </template>
</test-fixture>

<script>
  function getComputedStyleValue(name, el) {
    let style;
    if (window.ShadyCSS) {
      style = ShadyCSS.getComputedStyleValue(el, name);
    } else if (el.getComputedStyleValue) {
      style = el.getComputedStyleValue(name);
    } else {
      style = getComputedStyle(el).getPropertyValue(name);
    }
    return style;
  };

  suite('gr-opacity-diff-tool tests', () => {
    let element;

    setup(() => {
      element= fixture('opacity-diff-fixture');
    });

    test('slider changes opacity of image', () => {
      const arrayOfNumbers = [0.73, 0.5, 0.0];
      arrayOfNumbers.forEach(number => {
        assert.notEqual(
          getComputedStyleValue('--my-opacity-value', element),
          number);
        element.$.opacitySlider.value = number;
        element.handleOpacityChange();
        assert.equal(
          getComputedStyleValue('--my-opacity-value', element),
          number);
      });
    });

    test('create the src string for images', () => {
      element.revisionImage = {
        type: 'IMG/src',
        body: 'Zx3Cgffk=',
      };
      const expectedOutcome = 'data:IMG/src;base64, Zx3Cgffk=';
      assert.equal(element.computeSrcString(element.revisionImage),
          expectedOutcome);
    });

    test('size scaling', () => {
      element._maxWidth = 200;
      element._maxHeight = 400;

      assert.equal(getComputedStyleValue('--img-width', element), '');
      assert.equal(getComputedStyleValue('--img-height', element), '');
      MockInteractions.tap(element.$.scaleSizesToggle);
      flushAsynchronousOperations();

      assert.equal(getComputedStyleValue('--img-width', element), '200px');
      assert.equal(getComputedStyleValue('--img-height', element), '400px');
    });

    test('resize the div container for base & revision image comparison', () => {
      assert.equal(getComputedStyleValue('--div-height', element), '');
      element._maxHeight = 500;
      element._maxWidth = 300;
      flushAsynchronousOperations();

      assert.equal(getComputedStyleValue('--div-height', element), '500px');
    });
  });
</script>